Answer:
I cause involuntary movements in your vehicle
Mr. and Mrs. Mustard have five daughters and each daughter has one brother. How many people are there in the Mustard family?
I drift forever with the current and flows to your everyday life. I make living easy but I am good at killing people too.
I am always around you but often forgotten. I am pure and clean most of the time, but occasionally rotten. What am I?
I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?
Give it food and it will live, give it water and it will die.